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Title: Rational Numbers (Construction)
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Series: Start Learning Numbers
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Parent Series: Start Learning Mathematics
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Chapter: Numbers
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YouTube-Title: Start Learning Numbers 9 | Rational Numbers (Construction)
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Bright video: Watch on YouTube
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Dark video: Watch on YouTube
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Ad-free video: Watch Vimeo video
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Original video for YT-Members (bright): Watch on YouTube
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Original video for YT-Members (dark): Watch on YouTube
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Forum: Ask a question in Mattermost
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Quiz: Test your knowledge
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Dark-PDF: Download PDF version of the dark video
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Print-PDF: Download printable PDF version
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Thumbnail (bright): Download PNG
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Thumbnail (dark): Download PNG
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Subtitle on GitHub: sln09_sub_eng.srt missing
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Download bright video: Link on Vimeo
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Download dark video: Link on Vimeo
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Timestamps (n/a)
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Subtitle in English (n/a)
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Quiz Content
Q1: Using the equivalence relation to construct the rational numbers, what is not correct?
A1: $[(0,8)] = [(0,0)]$
A2: $[(4,2)] = [(6,3)]$
A3: $[(-9,-3)] = [(9,3)]$
A4: $[(-4,1)] = [(8,-2)]$
A5: $[(1,1)] = [(-5,-5)]$
Q2: Using the equivalence relation to construct the rational numbers, how do we represent an integer $x$?
A1: $[(x,1)]$
A2: $[(x,x)]$
A3: $[(0,x)]$
A4: $[(x\cdot x , x+x)]$
A5: $[(5,x)]$
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Last update: 2025-07
